CN103490572B - Three freedoms switched reluctance motor - Google Patents

Three freedoms switched reluctance motor Download PDF

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CN103490572B
CN103490572B CN201310418235.8A CN201310418235A CN103490572B CN 103490572 B CN103490572 B CN 103490572B CN 201310418235 A CN201310418235 A CN 201310418235A CN 103490572 B CN103490572 B CN 103490572B
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stator
radial
rotor
phase
winding
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CN103490572A (en
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刘泽远
邓智泉
曹鑫
杨燕
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南京航空航天大学
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Abstract

本发明涉及一种三自由度磁悬浮开关磁阻电机,属于磁悬浮开关磁阻电机和磁悬浮轴承领域。 The present invention relates to a switched reluctance motor three degrees of freedom, and belongs to the switched reluctance motor field magnetic suspension bearings. 电机定子由径向磁场电机定子与两个磁轴承定子组成,径向磁场电机定子与两个磁轴承定子均为凸极结构,径向磁场电机定子的每个定子齿上绕有一个电机绕组,磁轴承定子的每个定子齿上绕有一个磁轴承绕组;转子由凸极转子与两个圆柱转子轴向叠加组成,凸极转子位于两个圆柱转子之间,凸极转子用于产生转矩,圆柱转子用于产生径向和轴向悬浮力。 A radial field machine stator with two stator magnetic bearing stators, and two radial magnetic stator magnetic bearing stator are salient structure, a motor winding wound on the stator teeth of each stator of the radial magnetic field, each wound on the stator teeth of the stator magnetic bearing a magnetic bearing winding; a rotor with a salient pole rotor axial superposition of two cylindrical rotor, the rotor salient pole located between the two cylindrical rotors, rotor salient poles for generating a torque cylindrical rotor for axial and radial levitation force. 本发明提供的一种三自由度磁悬浮开关磁阻电机,集无轴承开关磁阻电机与轴向磁悬浮轴承于一体,集成化高;轴向磁轴承定子齿上仅有一套绕组,且定子为凸极结构,可选的结构形式多;利用最小电感区实行悬浮控制,悬浮电流对转矩电流的影响小,相间耦合作用小。 The present invention provides a switched reluctance motor three degrees of freedom, the bearing assembly without the switched reluctance motor in one axial magnetic bearing, high integration; only one set of axial magnetic bearing stator windings on teeth, the stator and the convex electrode structures, multiple alternative structure; implemented using minimum inductance region levitation control, the levitation current little influence on the torque current, a small phase coupling.

Description

一种三自由度磁悬浮开关磁阻电机 Three freedoms switched reluctance motor

技术领域 FIELD

[0001 ] 本发明涉及一种三自由度磁悬浮开关磁阻电机,属于磁悬浮开关磁阻电机和磁悬浮轴承领域。 [0001] The present invention relates to a three degree of freedom in switched reluctance motors, switched reluctance motors and belongs to the field of magnetic suspension bearings.

背景技术 Background technique

[0002] 无轴承开关磁阻电机是20世纪末发展起来的一种新型磁悬浮电机。 [0002] The switched reluctance motor without bearing 20 is a new century developed magnetic levitation motor. 以定子上绕组的个数多少分类,有单绕组无轴承开关磁阻电机和双绕组无轴承开关磁阻电机。 As a number of stator windings classification number, a single switched reluctance motor windings and bearings without double winding bearingless switched reluctance motor. 二者的控制策略有所不同,但其悬浮力和转矩产生的机理是相同的,均为通过控制绕组电流大小不同,以形成一个不对称磁通,进而产生方向和大小可控的径向悬浮力,从而使电机具有旋转和自悬浮能力。 Both control strategies are different, but the mechanism of suspension force and torque generated is the same, by controlling the winding current are of different sizes to form an asymmetric magnetic flux, thereby generating radial direction and magnitude of controllable levitation force, so that the motor having a rotating and self-suspending power. 相对于双绕组无轴承开关磁阻电机,单绕组无轴承开关磁阻电机定子仅有一套绕组,结构更为简单,且控制算法简单,已成为无轴承开关磁阻电机的一个研究热点和发展趋势。 With respect to the double winding bearingless switched reluctance motor, not only a single-winding switched reluctance motor stator windings bearing structure is simpler, and the control algorithm is simple, and has become a research hotspot Trend bearingless switched reluctance motor .

[0003]转矩和悬浮力之间存在着强耦合,且很难在控制策略和数学模型中实现二者的完全解耦,是无轴承开关磁阻电机运行性能难以提高的主要因素之一。 There is a strong coupling between the [0003] torque and suspension force, and it is difficult to achieve complete decoupling of the two control strategies and in the mathematical model, is a major factor switched reluctance motor operation is difficult to improve the performance of the bearing. 另外,因悬浮力控制所需,必须对绕组电流进行斩波控制,而高速运行时,反电动势的激增导致无法对绕组电流进行跟踪斩波控制,即会出现电流斩不住的现象,这大大影响了无轴承开关磁阻电机高速性能的发挥。 In addition, because of the force required to control the suspension must be chopper controlled winding current, while running at high speed, resulting in a surge of counter electromotive force can not be tracked chopper control of the winding current, the current cut will appear live phenomenon, which greatly without affecting the high-speed switched reluctance motor bearing performance of the play.

[0004] 无轴承电机若要实现五自由度悬浮运行,需要轴向磁悬浮轴承与其配合使用。 [0004] To achieve bearingless motor operation suspension five degrees of freedom, the axial magnetic bearing needs to go with it. 轴向磁轴承势必会增加悬浮电机系统的轴向长度,进而降低临界转速和功率密度。 Axial magnetic bearing is bound to increase the axial length of the suspension system of the motor, thereby reducing the critical speed and power density. 因此,在实现转矩和悬浮力解親控制基础上,实现无轴承电机和轴向磁轴承的集成化已成为磁悬浮电机领域的研究热点。 Thus, the torque and the suspension force in achieving parental control solution based on the realization integrated bearingless motor and the axial magnetic bearing has become a hot topic of magnetic levitation motor.

发明内容 SUMMARY

[0005]本发明目的是提出一种集无轴承电机和轴向磁轴承于一体、悬浮力和转矩在结构上完全解耦、高速适应性强、高功率密度的三自由度磁悬浮开关磁阻电机。 [0005] The object of the present invention is to propose a set of bearingless motor and in one axial magnetic bearing levitating force and torque on the complete decoupling structure, strong high-speed adaptability and high power density of switched reluctance three degrees of freedom motor.

[0006]本发明采用如下技术方案: [0006] The present invention adopts the following technical solution:

[0007] 本发明所述的一种三自由度磁悬浮开关磁阻电机,包括径向磁场电机定子,凸极转子,圆柱转子、径向磁场电机绕组、磁轴承定子,磁轴承绕组;电机定子由径向磁场电机定子与两个磁轴承定子组成,径向磁场电机定子与两个磁轴承定子均为凸极结构,径向磁场电机定子的每个定子齿上绕有一个电机绕组,磁轴承定子的每个定子齿上绕有一个磁轴承绕组;每个电机定子齿上的绕组按需要可串联或并联为一定相数的绕组串,两个轴向磁轴承所有定子上的绕组分别串联或并联或串并联为两个绕组串;转子由凸极转子与两个圆柱转子轴向叠加组成,凸极转子位于两个圆柱转子之间,凸极转子铁心用于产生转矩,圆柱转子用于产生径向和轴向悬浮力。 [0007] A switched reluctance motor three degrees of freedom according to the present invention, radial magnetic field comprises a stator, a rotor salient poles, a cylindrical rotor, radial magnetic field motor windings, magnetic bearing stator, a magnetic bearing windings; a stator two radial magnetic field and stator magnetic bearing stators, and two radial magnetic stator magnetic bearing stator are salient structure, a motor winding is wound on each stator tooth radial field machine stator, a magnetic bearing stator each of the stator teeth wound with a magnetic bearing winding; winding on each stator tooth as needed to be series or parallel string of a certain number of phase windings, two axial magnetic bearing stator windings are all connected in series or in parallel or a series-parallel strings of two windings; a rotor with salient rotor axial superposition of two cylindrical rotor, the rotor salient pole located between the two cylindrical rotor, salient pole rotor core for generating a torque for producing the cylindrical rotor radial and axial levitation force.

[0008] 有益效果 [0008] beneficial effects

[0009]本发明提供的一种三自由度磁悬浮开关磁阻电机,集无轴承开关磁阻电机与轴向磁悬浮轴承于一体,集成化高; [0009] The present invention provides three degrees of freedom a switched reluctance motor, switched reluctance motor bearing set free and in one axial magnetic bearing, high integration;

[0010]电机定子齿上只有一个绕组,相对于双绕组无轴承开关磁阻电机,结构简单,槽满率高,省铜省硅钢片,可降低电机制造成本; Only one winding teeth [0010] motor stator, with respect to the double winding bearingless switched reluctance motor, simple structure, high slot fill, save save silicon copper, motor manufacturing cost can be reduced;

[0011]轴向磁轴承定子齿上仅有一套绕组,且定子为凸极结构,可选的结构形式多; The [0011] axial magnetic bearing stator windings only one set of teeth, and the stator structure is a salient pole, multiple alternative structure;

[0012]结构上径向悬浮力和转矩、以及径向悬浮力和轴向悬浮力完全解耦,控制方法简单,悬浮性能好。 [0012] Structurally radial suspension forces and moments, and axial and radial levitation force suspension complete decoupling, the control method is simple, good suspension properties.

[0013]利用最小电感区实行悬浮控制,悬浮电流对转矩电流的影响小,相间耦合作用小。 [0013] With the implementation of the minimum inductance region levitation control, the levitation current little influence on the torque current, a small phase coupling.

[0014]电机绕组利用率高,功率密度高,高速适应性强。 [0014] motor windings high utilization, high power density, high-speed adaptation.

附图说明 BRIEF DESCRIPTION

[0015]图1是本发明的三自由度磁悬浮开关磁阻电机的三维结构剖视图; [0015] FIG. 1 is a three-dimensional structure of three degrees of freedom of the switched reluctance motor cross-sectional view of the present invention;

[0016]图2是本发明的三自由度磁悬浮开关磁阻电机的绕组示意图 [0016] FIG. 2 is a schematic winding three degrees of freedom of the switched reluctance motor of the present invention.

[0017]图3是本发明三自由度磁悬浮开关磁阻电机中的三相12/8极无轴承开关磁阻电机的绕组电感和电流与转子位置角的变化曲线图。 [0017] FIG. 3 is a graph showing the change in three degrees of freedom switched reluctance motor according to the present invention is 12/8 - pole three-phase switched reluctance motor bearing and inductor winding current and rotor position angle.

[0018]图中标号名称:I是径向磁场电机定子,2是凸极转子,3是圆柱转子,4是径向磁场电机绕组,5是磁轴承定子,6是磁轴承绕组,7是绕组电感,8是悬浮阶段绕组电流,9转矩阶段绕组电流。 [0018] FIG numeral Title: I is the radial magnetic stator, the rotor salient poles is 2, 3 is a cylindrical rotor, the winding 4 is a radial flux machine, is a magnetic bearing stator 5, 6 is a magnetic bearing windings, the winding 7 is inductance, suspended phase winding current 8, 9 of the torque phase winding current.

具体实施方式 Detailed ways

[0019]下面结合附图对本发明进一步详细说明: [0019] DRAWINGS The present invention is further described in detail:

[0020] 如图1所示:本发明三相12/8极3自由度磁悬浮开关磁阻电机的三维结构示意图,包括径向磁场电机定子1、凸极转子2、圆柱转子3、径向磁场电机绕组4、磁轴承定子5和磁轴承绕组6。 [0020] As shown in FIG 1: the present invention is a three-phase three-dimensional structure of 12/8 electrode 3 DOF schematic switched reluctance motor, a stator 1 includes a radial flux machine, the salient rotor 2, a cylindrical rotor 3, a radial magnetic field motor winding 4, the magnetic bearing stator 5 and the magnetic bearing windings 6. 径向磁场电机(即无轴承开关磁阻电机)定子和两个轴向磁轴承定子均为凸极结构,其中电机定子齿数为12,磁轴承定子齿数为偶数即可,电机定子和磁轴承定子齿上都绕有一个绕组,绕组形式为集中绕组;转子由凸极转子和两个圆柱转子通过轴向叠压而成,凸极转子位于两个圆柱转子之间,其中凸极转子用于产生转矩,不产生悬浮力,而圆柱转子用于产生径向和轴向悬浮力,不产生转矩;通过控制电机绕组的电流,分时分区域产生径向悬浮力和转矩,二者完全解耦;通过控制两个磁轴承绕组的电流,使两个轴向气隙磁通不对称,进而产生轴向悬浮力;利用最小电感平顶区作为产生径向悬浮力的区域,此区域内不产生转矩,且电机悬浮电流对电机转矩电流影响小,电机相间耦合作用小。 Motor radial magnetic field (i.e. without bearing switched reluctance motor) and the stator are two axial magnetic bearing stator salient structure, in which the stator teeth 12, the stator teeth is even magnetic bearing can, and stator magnetic bearing stator the windings are wound on a tooth, the form of a concentrated winding coil; laminated rotor pole rotor and two convex cylindrical rotor formed by an axial, salient rotor located between two cylindrical rotor, wherein the rotor salient poles for generating torque, suspension force is not generated, and a cylindrical rotor for axial and radial suspension forces, no torque is generated; the motor windings by the current control, the subregion sharing radial torque and suspension force, both complete solution coupled; two magnetic bearing windings by the current control, the two axial air gap flux asymmetry, thereby generating an axial force is suspended; using minimum inductance plateau region as a region of radial suspension force, this region is not generates torque, and the motor current is small suspended impact torque current motor, a small motor phase coupling.

[0021]图2是一相绕组由分布在4个相对齿的线圈构成,彼此在空间上相隔90°,且这4个绕组分别独立控制,分时分区域产生悬浮力和转矩。 [0021] FIG. 2 is a phase winding distributed by the four coils constituting the opposing teeth, 90 ° apart from one another in space, and the four windings are independently controlled, time sub-region generating levitation force and torque. B、C相的4个绕组与A相绕组结构相同,仅在位置上与A相相差30°和-30°。 B, C-phase and A-phase coil 4 winding the same structure, only the A-phase position and the phase difference 30 ° -30 °.

[0022] △相绕组的4个线圈分别绕在两对相对齿上,其中匕1+、匕2+丄3+^4+分别为八相4个绕组流入的电流,ial_、ia2_、ia3_、ia4_分别A相为4个绕组流出的电流,α、β表示直角坐标系的两个方向。 [0022] △ phase windings are four coils wound on two pairs of opposing teeth, wherein dagger 1+, 2+ Shang dagger ^ 3 + 4 + 4 are eight-phase current flowing in windings, ial_, ia2_, ia3_, a ia4_ are four phase winding current flowing, α, β represents two directions of the rectangular coordinate system.

[0023]图3为三相12/8极无轴承开关磁阻电机的绕组电感和电流与转子位置角的变化曲线图。 [0023] FIG. 3 is a three-phase 12/8 pole Bearingless switched reluctance motor winding inductance and a graph showing changes of current and rotor position. 定义定子齿与转子齿对齐位置为零度位置,即对齐位置。 The stator tooth and tooth defined position of the rotor is aligned to the zero position, i.e. the aligned position. 对三相12/8极无轴承开关磁阻电机而言,一个转子周期角为45°,因此电机每相绕组悬浮导通的区间为15°,这样才能保证电机的稳定悬浮运行。 12/8 - pole three-phase switched reluctance motor in terms of bearing, angle of a rotor period of 45 °, so that each phase winding of the motor is turned suspension interval of 15 °, so as to ensure a stable suspension of operation of the motor. 由于采用转矩和径向悬浮力分时分区域的控制策略,每一时刻需两相绕组同时导通,一相绕组用产生径向悬浮力,另一相绕组产生转矩。 As a result of the torque and radial suspension forces sharing sub-area control strategy, required two-phase windings each time simultaneously turned on, a phase winding with radial levitation force, the other phase winding torque is generated.

[0024]以A相为例来说明无轴承电机悬浮原理,转子位于[15°,30°]时为悬浮区间,此时电机磁路的磁导最小,电感值最小且恒定,称该区域为最小电感平顶区,本发明中的无轴承开关磁阻电机就是利用该区域产生径向悬浮力;另外,由于该区间绕组电感恒定不变,故不产生转矩,以此实现转矩和悬浮力解親。 [0024] When the A phase as an example to illustrate the principle of suspension bearingless motor, the rotor is located [15 °, 30 °] for the suspension range, when the motor circuit is minimized permeability, the inductance value of the minimum and constant, the area is called minimum inductance plateau region, the present invention is not switched reluctance motor using the bearing region of the radial levitation force; Further, since the winding inductance constant interval, so that no torque, and torque in order to achieve a suspension pro-solution forces. 转子位于[15°,30° ]时,由于圆柱转子部分的磁路磁阻相对于凸极转子非常小,又因为径向悬浮力与磁路磁阻成反比,因此凸极转子部分在该区间产生的径向悬浮力相对于圆柱转子部分可忽略不计,提供无轴承电机径向悬浮的悬浮力主要由圆柱转子产生。 When the rotor is [15 °, 30 °], since the magnetic resistance of the cylindrical portion of the rotor with respect to the salient pole of the rotor is very small, and because the magnetic circuit reluctance radial levitation force inversely proportional to the portion of the rotor salient pole section radial levitation force with respect to the cylindrical portion of the rotor may be negligible, to provide suspension forces radially motor suspension bearings produced mainly by a cylindrical rotor.

[0025] 具体径向悬浮力控制原理为:α方向径向悬浮力由绕组电流ial和ia3控制,当ial>ia3时,产上α正方向径向悬浮力,反之,产生α负方向径向悬浮力;同理,β方向悬浮力由绕组电流ia2和ia4控制,当ia2> ia4时,产上β正方向径向悬浮力,反之,产生β负方向径向悬浮力;α方向和β方向径向悬浮力可合成任意方向的径向悬浮力,因此通过4个绕组不对称励磁,可产生任意径向方向和大小的悬浮力,进而实现电机在[15°,30° ]区间的自悬浮功能。 [0025] DETAILED radial levitation force control principle is: the suspension force radial direction of the winding currents ial and [alpha] is controlled by IA3, when ial> when ia3, α positive direction of the radial force on the suspension of the production, on the contrary, generates a negative radial direction [alpha] levitation force; Similarly, the direction of the levitation force beta] ia2 and winding current is controlled by IA4, when ia2> ia4 when producing beta] positive direction on radial suspension forces, whereas a negative radial direction beta] generated levitation force; beta] [alpha] direction and the direction radial levitation force may be synthesized in any direction radial suspension forces, thus by asymmetric excitation windings 4, the suspension force may be generated in any radial direction and size, thus achieving levitation motor [15 °, 30 °] interval Features. 同理,[0,15° ]和[30°,45°]区间的径向悬浮力可分别由B相和C相绕组产生,进而实现整个转子周期内的悬浮运行。 Similarly, [0,15 °] and [30 °, 45 °] interval radial suspension forces respectively by the C-phase and B-phase windings, so as to realize the suspension throughout the operation cycle of the rotor.

[0026]转子位于[30°,45° ]时为电动阶段,此时电感处于上升区域,产生正转矩。 [0026] The rotor is [30 °, 45 °] when the electric stage, this time in the rising inductance region, generating a positive torque. 当A相悬浮励磁结束时,由于不对称励磁导致A相4个绕组的电流大小不等,因此需要相同的驱动信号控制A相绕组的主功率开关,先使其四套绕组电流相同,然后再利用开关磁阻电机的电流控制方法加以控制,具体的电流控制方法为斩波电流控制或PWM控制或单脉冲控制等。 When the A-phase suspension excitation, the excitation leads due to the asymmetric unequal magnitude of the current A four phase windings, thus requiring the same driving signal controlling the main power switch of the phase windings A, so the first four sets of identical winding current, then using the current control method of a switched reluctance motor to be controlled, the specific method of controlling the current chopper control or PWM current control or single pulse control. 同理,在电感下降区导通时,即为发电运行,控制策略与电动阶段相似。 Similarly, when the inductance drop zone is turned on, that is, the power generation operation, the control strategy is similar to the electric stage.

[0027]考虑到磁路的对称性,两个轴向磁轴承定子齿数为偶数即可。 [0027] Considering the symmetry of the magnetic circuit, the two axial magnetic bearing stator to an even number of teeth. 每个磁轴承定子上的线圈可串联、并联或串并联为一套绕组,并定义Z轴正方向磁轴承绕组电流为izl,Z轴负方向磁轴承绕组电流为iZ2。 Coils on each magnetic bearing stator in series, parallel, or a set of winding, and define the Z-axis positive direction of the magnetic bearing winding current is IZl, the negative direction of the magnetic bearing winding current Z axis iZ2. 当izi> iZ2时,产上Z正方向轴向悬浮力,反之,产生Z负方向轴向悬浮力;因此通过对这2个轴向绕组不对称励磁,可产生任意大小和方向可控的轴向悬浮力,从而实现轴向的稳态悬浮。 When izi> iZ2, Z axial direction of the levitation force produced positive, whereas negative axial direction Z generated levitation force; Therefore, by these two axially asymmetric field winding, can be produced in any size and direction controllable axis the levitation force, thereby achieving a steady state axial suspension.

[0028]对该技术领域的普通技术人员而言,根据以上实施类型可以很容易联想其他的优点和变形。 [0028] those of ordinary skill in the art, according to the above embodiment can easily think of other types advantages and modifications. 因此,本发明并不局限于上述具体实例,其仅仅作为例子对本发明的一种形态进行详细、示范性的说明。 Accordingly, the present invention is not limited to the specific examples, which by way of example only of one aspect of the present invention in detail, an exemplary description. 在不背离本发明宗旨的范围内,本领域普通技术人员根据上述具体实例通过各种等同替换所得到的技术方案,均应包含在本发明的权利要求范围及其等同范围之内。 In the spirit of the present invention without departing from the scope of those of ordinary skill in the art based on the various specific examples of the technical solutions obtained equivalents shall be included within the scope of the appended claims and their equivalents of the present invention scope.

Claims (1)

1.一种三自由度磁悬浮开关磁阻电机,其特征在于:包括径向磁场电机定子(I),凸极转子(2),圆柱转子(3)、径向磁场电机绕组(4)、磁轴承定子(5),磁轴承绕组(6);电机定子由径向磁场电机定子(I)与两个磁轴承定子(5)组成,径向磁场电机定子(I)与两个磁轴承定子(5)均为凸极结构,定子(I)的每个定子齿上绕有一个径向磁场电机绕组(4),磁轴承定子(5)的每个定子齿上绕有一个磁轴承绕组(6);转子由凸极转子(2)与两个圆柱转子(3)轴向叠加组成,凸极转子(2)位于两个圆柱转子(3)之间,凸极转子(2)用于产生转矩,圆柱转子(3)用于产生径向和轴向悬浮力;所述的该磁阻电机为三相12/8极无轴承开关磁阻电机,磁阻电机三相绕组为A相、B相、C相,每相绕组悬浮导通的区间为15°,所述的每一相绕组由分布在4个相对齿的线圈构成,彼此在空间上相隔90°,其中A相包括4个绕组, A switched reluctance motor three degrees of freedom, characterized by: a motor stator comprising a radial magnetic field (the I), the rotor salient pole (2), a cylindrical rotor (3), radial magnetic field motor windings (4), a magnetic bearing stator (5), the magnetic bearing winding (6); radial magnetic field from the stator motor stator (I) with two magnetic bearing stator (5), with the radial magnetic stator (I) with two magnetic bearing stator ( 5) are salient structure, a radial magnetic field wound motor winding (4) on each stator tooth of the stator (I), the winding is wound a magnetic bearing (6 on each stator tooth of the stator magnetic bearing (5) ); a rotor of a salient pole rotor (2) with two cylindrical rotor (3) an axial superposition of salient poles of the rotor (2) located between the two cylindrical rotor (3), the rotor salient pole (2) for generating a turn moment, the cylindrical rotor (3) for generating an axial and radial levitation force; according to the three-phase reluctance motor without bearing 12/8 pole switched reluctance motor, three-phase reluctance motor phase windings a, B phase, C phase, each winding section of the suspension turned 15 °, each of said phase windings distributed by the four coils constituting the opposing teeth, 90 ° apart from each other in space, wherein a comprises a four phase windings , 4个绕组分别独立控制,分时分区域产生悬浮力和转矩;所述的A相绕组的4个相对齿的线圈中ial+、ia2+、ia3+、ia4+分别为A相的4个绕组流入的电流;ial-、ia2-、ia3-、ia4_分别为A相的4个绕组流出的电流;α、β表示直角坐标系的两个方向;α方向径向悬浮力由绕组电流ial和ia3控制,当ial>ia3时,产上α正方向径向悬浮力,相反产生α负方向径向悬浮力;β方向悬浮力由绕组电流;^和ia4控制,当ia2> ia4时,产上β正方向径向悬浮力,相反产生β负方向径向悬浮力;α方向和β方向径向悬浮力可合成任意方向的径向悬浮力,通过4个绕组不对称励;进而实现A相绕组在[15°,30° ]区间的自悬浮功能;同理,[O,15° ]和[30°,45° ]区间的径向悬浮力可分别由B相和C相绕组产生,进而实现整个转子周期内的悬浮运行。 Four windings are independently controlled, time subregional generated levitation force and torque; the A-phase winding 4 opposing teeth in the coil ial +, ia2 +, ia3 +, ia4 + 4 windings flowing currents of phase A; ial-, ia2-, ia3-, ia4_ are four current phase winding a flows; α, β represents two directions of the rectangular coordinate system; radial direction [alpha] ial suspension force and the winding current is controlled by ia3, when ial> IA3 time, the production of suspension force α positive radial direction, opposite the negative direction to produce α radial levitation force; beta] direction by the suspension force winding current; ^ IA4 and control, when ia2> ia4, the positive direction of the diameter producing beta] to the suspension force, opposite to the negative direction to produce β radial levitation force; radial suspension forces in any direction radial levitation force may be synthetic α and β orientation directions, by asymmetric excitation windings 4; thus achieving phase winding a [15 ° , 30 °] interval from the suspension function; Similarly, [O, 15 °] and [30 °, 45 °] interval radial suspension forces respectively generated by the phase windings B and C, so as to realize the entire period of the inner rotor the suspension runs.
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CN104393709A (en) * 2014-09-04 2015-03-04 林成实 Magnetic-levitation-type motor
CN105508425B (en) * 2015-12-28 2018-03-09 宁波达奋精工轴承有限公司 A self-generating type magnetic bearing
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